1  /* FMA version of fmaf.
       2     Copyright (C) 2009-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #define NO_MATH_REDIRECT
      20  #include <config.h>
      21  #include <math.h>
      22  #include <init-arch.h>
      23  #include <libm-alias-float.h>
      24  
      25  extern float __fmaf_sse2 (float x, float y, float z) attribute_hidden;
      26  
      27  
      28  static float
      29  __fmaf_fma3 (float x, float y, float z)
      30  {
      31    asm ("vfmadd213ss %3, %2, %0" : "=x" (x) : "0" (x), "x" (y), "xm" (z));
      32    return x;
      33  }
      34  
      35  
      36  static float
      37  __fmaf_fma4 (float x, float y, float z)
      38  {
      39    asm ("vfmaddss %3, %2, %1, %0" : "=x" (x) : "x" (x), "x" (y), "x" (z));
      40    return x;
      41  }
      42  
      43  
      44  libm_ifunc (__fmaf, CPU_FEATURE_USABLE (FMA)
      45  	    ? __fmaf_fma3 : (CPU_FEATURE_USABLE (FMA4)
      46  			     ? __fmaf_fma4 : __fmaf_sse2));
      47  libm_alias_float (__fma, fma)
      48  
      49  #define __fmaf __fmaf_sse2
      50  
      51  #include <sysdeps/ieee754/dbl-64/s_fmaf.c>